We use brain maps to find our loved ones, to predict where they are, and to search for them when they are gone. A key problem in grief is that there is a mismatch between the virtual map we always use to find our loved ones, and the reality, after they die, that they can no longer be found in the dimensions of space and time. The unlikely situation that they are not on the map at all, the alarm and confusion that this causes, is one reason grief overwhelms us.
